Spin bike



FIG. 1 is a front, top, left perspective view of a spin bike, showingthe new design;

FIG. 2 is a rear, top, right perspective thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines of uneven length illustrate the boundary of the claimeddesign and form no part thereof. The broken lines of even length depictportions of the spin bike that form no part of the claimed design.

CLAIM The ornamental design for a spin bike, as shown and described.